Can I Use DPG Alone as a Reed Diffuser Base, or Will Its Viscosity Affect How Quickly the Liquid Travels Through the Reeds?
शेयर करना
Does viscosity slow the reeds? A thicker liquid is commonly described as climbing a reed more slowly — but once reeds are loaded, evaporation from the reed is often the brake. Measure both.
How do I measure travel? Weigh bundles of 3 reeds dry, then after 1 h, 3 h and 24 h in the liquid. See the uptake test.
What should I try first? More reeds. Arm C keeps DPG and goes from 6 to 8 reeds; if that fixes the room, keep the DPG.
Yes, you can — and you can measure whether its viscosity is the problem
DPG — dipropylene glycol — is commonly described as a low-odour, relatively slow-evaporating glycol carrier, and as noticeably more viscous than many lighter perfumery solvents. Many makers use it alone with fragrance oil and fibre or rattan reeds. CSI does not sell DPG, and this page does not give viscosity or evaporation figures for it, because they vary by grade and supplier and because a viscosity number would not tell you what you actually need to know: how your oil, in the DPG you use, at your load, behaves on your reeds in your room.
Your instinct about viscosity is reasonable. A reed diffuser works in two steps. The liquid travels up the reed by capillary action, and then the carrier and fragrance evaporate from the part of the reed sticking out of the bottle. A thicker liquid is commonly described as travelling up a capillary more slowly, and a slow-evaporating carrier releases less per hour from the reed surface. Either can make a diffuser quiet. But they are different problems with different fixes, and the fragrance oil you add changes the blend's flow too — often making it thinner than DPG on its own. So the honest answer is: use DPG alone if your test shows the reeds load fully and the room is strong enough; change the carrier only if the test points at the carrier rather than the reeds, the load or the room.
This page gives you the test. It uses Eucalyptus Spearmint at 25% by weight in the 50 ml Gold Reed Diffuser Bottle 50 ml, the DPG you already hold, and Pure Performance Base — the neutral ready-made base, the only CSI base sold in a 100 g size — as the comparison. It adds a third arm that changes reed count instead of carrier, because if more reed surface fixes a quiet DPG diffuser, you never needed a new carrier at all.
| You see… | Reed uptake (travel) | Bottle g/day (what leaves) | Room score | Most likely limit |
|---|---|---|---|---|
| Pattern 1 | Slow | Low | Weak | The carrier — viscosity and evaporation together |
| Pattern 2 | Fast | Low | Weak | Evaporation from the reed, not travel — the carrier's volatility or a still, cool room |
| Pattern 3 | Fast | Normal for your target | Weak | Not the carrier: the oil, the load or the room size |
| Pattern 4 | Slow | Normal | Good | Nothing to fix — slow loading, good steady state |
| Pattern 5 | Any | Higher with 8 reeds | Better with 8 reeds | Reed surface, not carrier — add reeds before changing DPG |
This page owns the viscosity question for DPG. If you are still choosing between CSI's ready-made bases, the base-selection pillar shortlists them by fragrance family, and the solvent-route pillar compares DPG with Augeo-type and alcohol-based formulas.
How a carrier's thickness and volatility show up in a diffuser
Picture the reed as a bundle of very fine channels. When it first goes into the liquid, the liquid climbs those channels until the reed is wet along its length. How quickly that happens depends on the liquid — thicker liquids are commonly described as climbing more slowly — and on the reed: fibre reeds and rattan reeds have different internal structures, and even reeds of one type vary. CSI's fibre reeds are 20.3 cm long; their diameter is not published, so this page never assumes it.
Once the reed is saturated, the system settles into a steady state. Liquid evaporates from the exposed reed and more climbs up to replace it. At that point, the speed of climbing matters only if it is slower than the speed of evaporation; if evaporation is the slower step, the reed stays wet and the limiting factor is how readily the carrier and fragrance leave the surface. That is why a viscous carrier does not automatically mean a weak diffuser — a slow climb can still keep up with slow evaporation — and why a fast-climbing carrier can still give a quiet room if it is reluctant to evaporate.
The fragrance oil complicates both steps. At 25%, a quarter of the blend by weight is oil, and many fragrance oils are commonly described as thinner and more volatile than DPG. So the blend you put in the bottle can travel and evaporate quite differently from DPG on its own. That is why the test below measures the scented DPG blend, not just DPG, and why it includes plain DPG only in the uptake glass, as a reference for how much the oil changes things.
Test A: the reed-bundle uptake test
This is the direct measurement of travel. Use three liquids in three narrow glasses of your own — tall enough that a reed stands with most of its length out: plain DPG, DPG with 25% oil, and Pure Performance with 25% oil. Put 40 g of liquid in each. Weighing a single reed is often beyond a kitchen-style scale, and CSI does not publish the Weighing Scale's resolution, so weigh bundles of 3 reeds instead: three reeds from the same pack, held together with a small rubber band above the liquid line.
| Liquid | Dry bundle g | Gain 1 h | Gain 3 h | Gain 24 h | Wet line 15 min / 1 h / 3 h | Tips smell of oil at |
|---|---|---|---|---|---|---|
| Plain DPG (reference) | ___ | ___ | ___ | ___ | ___ / ___ / ___ | — |
| DPG + 25% oil | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ h |
| Pure Performance + 25% oil | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ h |
How to read it. If the scented DPG bundle has gained about as much by 24 hours as the scented Pure Performance bundle, and its tips smell of the oil, travel is not your limit — the reeds are loading. If the DPG bundle is still clearly lighter at 24 hours and its tips smell faint, travel is slow. Compare plain DPG with scented DPG too: if adding the oil speeds uptake noticeably, your blend is already thinner than DPG alone, and a lower load would make it slower, not faster. There is no published standard for how fast a reed should load, so the comparison against the ready-made arm is the yardstick, not an absolute number.
Test B and C: grams per day and the room, with a reed-count arm
Uptake tells you about travel. The bottles tell you what actually leaves and what you actually smell. Every bottle gets an example 45 ml fill — 45 g at an example 1.00 g per ml — at 25%: 11.25 g of oil and 33.75 g of carrier, weighed into the bottle. The third arm keeps DPG and adds two reeds, so you can see whether more surface does what a thinner carrier would.
| Arm | Bottles | Carrier | Reeds | What it isolates |
|---|---|---|---|---|
| A — control | B1–B3 | The DPG you use | 6 | Your current setup |
| B — carrier | B4–B6 | Pure Performance Base | 6 | Does a ready-made carrier change g/day and score? |
| C — surface | B7–B9 | The DPG you use | 8 | Does 1.33× the reeds do what a new carrier would? |
| Hold-back | B10 | The DPG you use | None, capped | Clarity reference at 7 days |
| Example density | 45 ml weighs | Oil at 25% | Carrier |
|---|---|---|---|
| 0.95 g/ml | 42.75 g | 10.69 g | 32.06 g |
| 1.00 g/ml | 45.00 g | 11.25 g | 33.75 g |
| 1.05 g/ml | 47.25 g | 11.81 g | 35.44 g |
| If your bottle loses… | Projected life | Liquid cost per day (₹108.70 fill) |
|---|---|---|
| 0.50 g/day | 90 days | ₹1.21 |
| 0.75 g/day | 60 days | ₹1.81 |
| 1.00 g/day | 45 days | ₹2.42 |
| 1.50 g/day | 30 days | ₹3.62 |
| 2.00 g/day | 22 days | ₹4.83 |
Put your measured rates for each arm into that arithmetic. If arm A meets your life target comfortably but scores weakly, and arm C (more reeds) scores better while still meeting the target, you have solved the problem by adding reeds — the cheapest change on this page. If arm B scores better at a similar g/day, the ready-made carrier is releasing the fragrance more effectively from the same loss, and that is a genuine carrier effect. If arm B simply loses more grams per day and smells proportionally stronger, it has moved along the life–strength curve, which fast versus slow-evaporating bases helps you choose between.
Reading all three together
Combine the uptake sheet, the bottle sheet and the blind scores using the five patterns in the first table. Most quiet DPG diffusers turn out to be pattern 2, 3 or 5, not pattern 1. The reason is practical: DPG at 25% oil is a blend, not pure DPG, and reeds usually load within a day in most carriers. What DPG is commonly described as doing — evaporating relatively slowly — is a release question more than a travel question, and release can be changed by reed count, by room conditions, and by load before you change carrier.
| Bottle | Arm | Reeds | Fill g | Day 3 g | Day 21 g | g/day | Blind d7 / d14 / d21 | Clarity 7 d |
|---|---|---|---|---|---|---|---|---|
| B1 | A | 6 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B2 | A | 6 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B3 | A | 6 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B4 | B | 6 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B5 | B | 6 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B6 | B | 6 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B7 | C | 8 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B8 | C | 8 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B9 | C | 8 | ___ | ___ | ___ | ___ | ___ / ___ / ___ | ___ |
| B10 | Hold | 0 | ___ | — | — | — | — | ___ |
Two cautions. First, three bottles per arm is a screen; repeat any arm that looks better with more bottles before you change production. Second, keep the room honest: a test in an air-conditioned bedroom will read differently from a warm living room, and cooler Indian winters and fast summer evaporation show how much temperature alone can move the grams. Record the room temperature on every weighing day so you can see whether a change in g/day tracks the weather rather than the arm.
The priced test kit
Listed, in-stock CSI packs, CSI live pricing, pulled 14 October 2026 for the base, bottles, reeds and scale and CSI live pricing, pulled 24 September 2026, stock re-checked 14 October 2026 for the oil. Grams include a 5% working allowance. The DPG (322 g needed for the round) and the three narrow glasses for the uptake test are your own.
| Item | Need | Buy | Price | Skip if |
|---|---|---|---|---|
| Gold Reed Diffuser Bottle 50 ml | 10 bottles | 1 × pack of 10 | ₹826.00 | You sell in another bottle — test that one |
| Fiber Diffuser Reeds (Black) | 69 reeds | 1 × pack of 50 + 1 × pack of 25 | ₹636.00 | — |
| Pure Performance Base | 137.8 g | 2 × 100 g | ₹650.00 | — |
| Round 1, your own oil and DPG | ₹2,112.00 | |||
| Eucalyptus Spearmint (example oil) | 139.1 g | 1 × 100 g + 3 × 15 g | ₹559.32 | You hold the oil you will sell |
| Weighing Scale | 1 | 1 | ₹354.00 | You own a scale with fine enough steps |
| Round 1, everything bought | ₹3,025.32 |
The Pure Performance line is a good example of buying the right size for a test: two 100 g packs cover the 138 g the comparison arm needs for ₹650.00, where a 500 ml would cost ₹1,099.00. If arm B wins and you move to it, the 500 ml becomes the cheaper way to buy grams — it is cheaper per gram than the 100 g at any density above 0.676 g per ml.
The decision rule
| If this is true | It means | Do this |
|---|---|---|
| DPG blend clouded at 24–48 h or 7 days | A compatibility problem, not viscosity | Step the load down 5 points and retest — 7927 |
| Arm C (8 reeds) scores better and still meets your life target | Reed surface was the limit | Keep DPG. Buy reeds: ₹400.00 per 50 black |
| Uptake normal, g/day normal, score weak in every arm | Oil, load or room | Buy nothing yet. Check load and room — 7962, 7965 |
| Uptake slow, g/day low, score weak only in DPG arms | DPG is limiting with this oil | Move this fragrance to a ready-made base — 500 ml at ₹1,099.00 |
| Arm B scores higher at a similar g/day | The ready-made carrier releases this oil better | Repeat with 6 bottles per arm, then buy 500 ml |
| Arm B scores higher but loses far more g/day | A faster point on the curve, not a better carrier | Decide by your life target — 7928 |
Write the outcome into your formula sheet with the reed count, load, room and dates. If you later change any of those, the conclusion about DPG may change too. Ready-made base versus DPG for commercial diffusers covers the consistency and documentation side of keeping DPG in a commercial range, and Augeo-type versus DPG versus alcohol explains where DPG sits among the other solvent routes.
The CSI products in this test
| Size | Price | Per unit | Bottles of base it covers |
|---|---|---|---|
| 100 g | ₹325.00 | ₹3.25 per g | 2.96 bottles |
| 500 ml | ₹1,099.00 | ₹2.20 per ml | 14.81 bottles at 1.00 g/ml (example) |
| Pack | Price | Per gram | Bottles at 11.2 g oil |
|---|---|---|---|
| 15 g | ₹68.44 | ₹4.56 | 1.33 |
| 50 g | ₹212.40 | ₹4.25 | 4.44 |
| 100 g | ₹354.00 | ₹3.54 | 8.89 |
| 500 g | ₹1,652.00 | ₹3.30 | 44.44 |
| 1 kg | ₹3,068.00 | ₹3.07 | 88.89 |
| Pack | Price | Per reed | Bottles it dresses |
|---|---|---|---|
| Pack of 25 | ₹236.00 | ₹9.44 | 4 bottles at 6 reeds |
| Pack of 50 | ₹400.00 | ₹8.00 | 8 bottles at 6 reeds |
| Pack of 100 | ₹800.00 | ₹8.00 | 16 bottles at 6 reeds |
| Pack of 500 | ₹4,000.00 | ₹8.00 | 83 bottles at 6 reeds |
| Variant | Price | Per bottle | Stock |
|---|---|---|---|
| 50 ml · pack of 10 | ₹826.00 | ₹82.60 | In stock (14 Oct 2026) |
| 120 ml · pack of 10 | ₹1,062.00 | ₹106.20 | In stock (14 Oct 2026) |
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished diffusers. We sell ready-made bases and not DPG, so the easy answer is "DPG is too thick — switch". This page tells you DPG alone is a common carrier, gives no invented viscosity figures, and builds a reed-count arm into the test because adding reeds is often the cheaper fix.
Base, reed, bottle and tool prices are CSI live pricing, pulled 14 October 2026; fragrance-oil prices are CSI live pricing, pulled 24 September 2026, stock re-checked 14 October 2026. Every blend split, ml-to-gram conversion, per-bottle cost, kit total and cost-per-day figure on this page is computed and shown to two decimals so you can check it. CSI publishes no composition, density, viscosity or evaporation data for its bases, so every density used here is a labelled example and every g/day figure is either yours to measure or a labelled arithmetic grid.
Bottle counts per arm, weighing days, the clarity checkpoints, the room-scoring protocol and the decision thresholds are labelled working practices, not industry standards — none exists for reed diffusers. The 45 ml fill, the 1.00 g per ml density, the 40 g uptake glasses, the bundles of 3 reeds, the 30-second drip and the g/day values in the arithmetic grid are labelled working choices, not standards. For SDS or technical-data questions on a base, an oil's IFRA certificate, bulk quotes or GST invoicing, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- Which Reed Diffuser Base Should I Buy in India if I Want Strong Fragrance Diffusion and a Reasonable Product Life?
- Is a Ready-Made Reed Diffuser Base Better than DPG for Making Commercial Reed Diffusers?
- What Is the Difference Between Augeo-Type Diffuser Bases, DPG and Alcohol-Based Formulas for Reed Diffusers?
- How Do I Choose Between a Fast-Evaporating Reed Diffuser Base and a Slower-Evaporating Base for a 100 ml Product?
- My Current Reed Diffuser Base Lasts a Long Time but Produces Very Little Smell — Should I Change to a Lower-Viscosity Base?
- How Do I Compare Two Reed Diffuser Bases Using Evaporation Rate, Fragrance Throw, Clarity, Reed Compatibility and Cost per Bottle?
- How Do I Select a Commercial Reed Diffuser Base in India That Balances Fragrance Compatibility, Capillary Flow, Evaporation, Safety and Finished Product Cost?
- My Reed Diffuser Produces Good Throw Only When I Flip the Reeds — Does That Suggest a Problem with Reed Compatibility or Fragrance Delivery?
Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on the product pages named on each card — Eco Candle Wicks, Premium Candle Wicking Needle and Bamboo Wick Holder. They are general product reviews, not assessments of the guidance set out here. Names, star ratings, dates and products are as recorded by Judge.me and wording is unedited. "Verified buyer" appears only on the three reviews Judge.me recorded as verified — Monika Deep, Subhankar Roy and Sneha Tamang; the reviews from Ashwini, LJ and Lalitha Jagan are published but not recorded as verified, and carry no badge.
Figures used on this page: Diffuser bases, reeds, bottles and tools — CSI live pricing, pulled 14 October 2026: Pure Performance Base ₹325.00 / 100 g and ₹1,099.00 / 500 ml; Longevity Base ₹1,296.00 / 500 ml; Lift Base ₹1,099.00 / 500 ml; Depth Base ₹1,099.00 / 500 ml; Softness Base ₹1,099.00 / 500 ml; CSI HyperDiffusion Base™ ₹1,499.00 (out of stock, not offered); Fiber Diffuser Reeds (Black) ₹236.00 / 25, ₹400.00 / 50, ₹800.00 / 100, ₹4,000.00 / 500; Fiber Diffuser Reeds (White) ₹265.00 / 25, ₹450.00 / 50, ₹900.00 / 100, ₹4,500.00 / 500 (both 20.3 cm long; diameter not published); Gold Reed Diffuser Bottle ₹826.00 / pack of 10 × 50 ml, ₹1,062.00 / pack of 10 × 120 ml; Weighing Scale ₹354.00; Silicon Measuring Beaker ₹300.00 (100 ml), ₹600.00 (250 ml); CSI Pro Mixer ₹349.00. Fragrance oils — CSI live pricing, pulled 24 September 2026, stock re-checked 14 October 2026: Eucalyptus Spearmint Fragrance Oil ₹68.44 / 15 g, ₹212.40 / 50 g, ₹354.00 / 100 g, ₹1,652.00 / 500 g, ₹3,068.00 / 1 kg.
Non-price figures and assumptions: Load convention: fragrance load is a share of the total blend by weight (oil g = blend g × L; base g = blend g × (1 − L)). Where millilitres are turned into grams, the page uses a labelled example density of 1.00 g per ml with a ±5% sensitivity (0.95–1.05 g/ml) — weigh 100 ml of your own blend to get yours; the 120 ml and 50 ml bottle sizes are listing sizes, not fill lines. Worked example: 45 ml example fill in the Gold 50 ml bottle = 45 g at the example density; at 25% = 11.25 g oil + 33.75 g carrier. Working practices: uptake glasses of 40 g with bundles of 3 reeds weighed dry and at 1 h, 3 h and 24 h after a 30-second drip; 3 bottles per arm with 6 or 8 reeds plus a capped hold-back; 5% mixing allowance; weighings on days 0, 1, 3, 7, 14 and 21; blind scores on days 7, 14 and 21; clarity at 0, 24 and 48 hours and 7 days. The g/day values in the grid are arithmetic examples; the liquid cost per bottle uses the oil's 1 kg rate and Pure Performance 500 ml at the example density. DPG descriptions (low-odour, relatively slow-evaporating, more viscous than many lighter solvents) are general industry descriptions, not CSI data; no viscosity figure is given for any liquid. What CSI's base pages state (quoted as claims to test, not CSI measurements): every base page gives a 10–30% fragrance range of the total blend and a 24–48 hour rest before bottling; Pure Performance — neutral, "no added fixatives, no complex enhancements", all families, "start at 10% … up to a maximum of 30%", "20% recommended", "typical working blend 75% base + 25% fragrance", "flip reeds after the first hour"; Longevity — oriental/amber, woody, resinous/balsamic, spicy and gourmand families, slower "cold diffusion", avoid light florals, fresh citrus and aquatics, "heavy oils like oud can cloud at maximum load in some bases", 2–3 hours before the first flip; Lift — "perfumery-grade", floral, citrus, green and fruity families; Depth — warmth, roundness, "slow diffusion", chypre, leather, smoky and rich gourmand, "stabilises tricky sweet and spicy fragrance oils"; Softness — soft florals, powdery/musky and light gourmand. Marketing lines such as "performs in Indian climates", "no separation" and "even wicking" are claims to test. Some base pages mention rattan; CSI sells fibre reeds, not rattan. CSI publishes no composition, density, viscosity, evaporation rate, flash point or shelf life for any base, and no throw, evaporation or longevity data for any base, oil or reed; reed diameter, bottle neck size and fill line are not published. No CSI base is ranked above another on this page — the five are separated only by what their own pages say they are for. Material costs exclude labour, labels, boxes, freight and GST. Diwali 2026 falls on Sunday 8 November.